Ore-crushing machine.



No. 893,540. I PATENTED JULY 14, 1908. P. B. PB'TTENGILL.

ORE ORUSHING MACHINE.

APPLICATION FILED FEB. a. 1906.

' 3 SHEETS-SHEET 1.

No. 893,540. PATENTED JULY 14, 1908.

F. B. PETTENGILL.

ORE CRUSHING MACHINE.

APPLICATION FILED FEB B, 1906.

3 SHEETS-SHEET 2.

No. 893,540. y PATENTED JULY 14, 1908.

F. B. PBTTBNGILL.

ORE GRUSHING MACHINE.

APPLICATION FILED FEB.8,1906.

3 SHEETS-SHEET 3.

imjw' Q WW UNITED STATFS PATENT OFFICE.

FREDERICK BIPETIENGILL, OF BURBANK, CALIFORNIA, ASSIGNOR TO SAMUEL L. KISTLER, OF LOS ANGELES, CALIFORNIA.

ORE-CRUSHING MACHINE.

Specification of Letters Patent.

Patented July 14, 1908.

. Application filed February 8, 1906. Serial No. 300,144.

T all whom it may concern:

Be it known that I, FREDERICK B. PET- TENGILL, a citizen of the United States, residing at .Burbank, in the county of Los Angeles and State of California, have invented new and useful Improvements in Ore-Crushing Machines, of which the following is a specification.

My invention relates to an ore crushing machine in which the ore is crushed by traveling rollers which travel on a circular track and are driven by power applied to the periphery of the rolls; and the object thereof is to produce a compact machine which may be driven at any desired rate of speed and in which the ore feed will be automatically regulated. I accomplish these objects by the mechanism described herein and illustrated in the accompanying drawings in which Figure lis a central vertical section with a portion of the feeding mechanism omitted, on the line 1-1 of Fig. 2. Fig. 2is a plan with the parts broken away for clearness of illustration and the feeding mechanism omitted. Fig. 3is a plan of the crushing rolls and their mounting with parts in section.

In the drawings 4 is the base frame in which is rotatively mounted shaft 5 whichcarries the driving pulley 6 to which the power is applied todrive the shaft. To the base-frame is secured the bottom trackframe 7 in'the top of which is an annular trough 8 in which is mounted the annular track 9 on which the crushing rolls 10 travel. The sides of the trough flare outwardly and upwardly while the edges of the track are vertical, thereby providing an amalgamating channel 11 in which mercury is received to catch the free gold.

The axles 12 of the crushing rolls at the in ner ends project into arms 13 which are pivotally mounted on shafts 43 which pass through arms 44 of the frame 45, which frame surrounds shaft 14 with babbitt 46 interposed between said. arm and said shaft. The outer ends of these axles are carried by bearings 47 which are secured to an annular ring 48 to hold the crushing rolls against centrifugal force when the rolls are rotated.

The crushing rolls are formed of a central hub through which aXlef 12 passes. At one end of the hub is, an outwardly projecting flange l) which preferably has a beveled edge. At the other end of the hub is an annular plate 0 which slips with a tight -fit upon the hub. The edge of this plate is preferably beveled. This plate is secured to flange I) by bolts d and together they receive and hold in place the tires 6 which has the inner edge of a configuration to fit the flange and plate. When the tire becomes worn out it can be quickly and easily removed and a new one put in place.

The upper portion of shaft 14 is provided. with channels 15 in which are received the inwardly projecting annular lugs 16 of the spring frame 16. To make a good wearing surface Babbitt metal 17 is received between them. This spring frame is cast in two parts and is bolted together by bolts 18 at the top as shown in Fig. 2 and by other bolts, not shown. Passing through the upper end of the spring frame and secured thereto by key 19 is shaft 20 which also passes through vertical shaft 14. Upon the lower end of shaft 20 and secured thereto by key 21 is the bevelgear wheel 22 which meshes with a bevelpinion 23 secured. upon shaft 5 by key 24. Resting upon and supported by the crushing rolls is the top track 25 which is secured to the spring supporting frame 26 which receives the lower ends of springs 27, whose upper ends bear against follower plates 28. These follower plates are secured to the lower ends of the pressure bolts 29, which bolts pass in threaded contact through the projecting rim of the spring frame, whereby the pressure of the springs upon the top track is regulated. The spring frame is provided with a plurality of wings 30 which project outwardly between the springs and are provided with lugs 31 to which are pivotally secured the draft rods 32. The other end of these draft rods pass through lugs 33 secured to the spring supporting frame 26 and the outer ends thereof are threaded and provided with nuts 34 on both sides of lugs 33 so as to regulate the draft length thereof. Secured to and resting upon the track frame is the screen frame 35 which is made up of sections bolted together by bolts 36 as best shown in Fig. 2. In this screen frame are removably secured by means of keys 37 the screens 38. Feed hopper 39 shown in Fig. 1 broken away for clearness of illustration is provided with a sleeve 39 which surrounds shaft 20 to keep it central in the machine. Feed spout 40 is secured to ring 48 and supports the hopper. This spout passes outwardly so as to clear the upper track frame and then inwardly and downwardly so as to deliver the ore upon the track 9 as shown in Fig. 1. This feed hopper and regulating mechanism for automatically feeding the ore will form the subject matter of an application to be hereafter filed.

In the operation of my ore crusher power is applied to rotate shaft 5 and through connecting mechanism motion is imparted to the top track frame, the track of which rests upon the top of the crushing rolls. The revolution of the top track causes the rolls to travel upon the bottom track, and at the same time the ore is delivered upon the bottom track from the feeding spout. By means of bolts 29 and springs 27 any desired pressure can be put upon the top track frame that is required for the proper crushing of the ore. As the depth of'ore on the bottom track increases the crushing rolls, top track frame and feeding spout will be gradually raised against the tension of spring 27 thereby gradually cutting off the supply of ore. As the ore is gradually crushed the pulp passes out through the screensinto trough 41 from which it is carried to an amalgamator or concentrator, not shown. By the use of a hinged connection between the top track frame and the spring frame and having the tension of the springs regulated, any desired pressure may be placed on the crushing rolls, which pressure increases as the amount of ore on the bottom track increases in depth. By the use of springs to obtain this pressure space is economized over the use of weights as the machine. can be made more compact and with spring pressure the higher the crushing rolls are raised off the bottom track the greater the spring pressure on the rolls. WVhere a weight is used to obtain the crushing power for the rolls it is constant and a large quantity ofore in the bottom track would have no more crushing strain put upon it when weight is used than a small quantity.

Having described my invention what I claim as new and desire to secure by Letters I Patent is 1. In anore crushing machine the combination of a non-rotating bottom track frame; a track on said frame; an u per track frame; a track on the underside of said upper track frame; crushing rolls between said tracks; a hollow vertical shaft secured to said bottom frame and passing upwardly therethrough, the upper end of said shaft having annular grooves therein; a spring frame surroundin the upper portions of said hollow vertica shaft and having annular lugs projecting into thefannulafgrooves of said vertical shaft; a plurality of springs between said upper track frame and said spring frame; means secured to said spring frame for varying the tension of said springs; draft connections between said spring frame and said upper track frame; and means to rotate said spring frame.

2. In an ore crushing machine the combination of a non-rotating bottom track frame said frame having an annular trough with flaring sides in the upper surface thereof; an annular track having vertical sides in said trough, the width of the top of said track be' ing less than that of the top of said trough whereby amalgamating channels are formed on each side of the track; an upper track frame; a track secured to the under side of said upper trackiframe; crushing rolls between said tracks; spring tension devices between said upper and lower track frames; and means to rotate said upper track frame.

3. In an ore crushing machine the combination of a non-rotating bottom track frame, said frame having an annular trough with flaring sides in the upper surface thereof; an annular track having vertical sides in said trough; a hollow vertical shaft secured to said frame and passing upwardly therethrough, the upper end of said shaft having annular grooves therein; an upper track frame; a track secured to the underside of said upper track frame; crushing rolls be tween said tracks; a spring frame surrounding the upper portions of said vertical shaft and having annular lugs projecting into the annular grooves of said vertical shaft; a plurality of springs between said upper track frame and said spring frame; means secured to said spring frame for varying the tension of said springs; draft connections between said spring frame and said upper track frame; and means to rotate said spring frame.

4. In a machine of the character described herein, traveling crushing rolls formed of a hub having a flange at one end; an annular plate on the other end of the hub, said plate being in contact with and supported by said hub; bolts securing said flange and plate; and a removable tire received upon said flange and plate and supported and held in place thereby.

In witness that I claim the foregoing I have hereunto subscribed my name this 26 day of January, 1906.

FREDERICK B. PETTENGILL.

Witnesses:

G. E. HARPHAM, HENRY T. HAZARD. 

